CN201336343Y

CN201336343Y - TD-SCDMA filter

Info

Publication number: CN201336343Y
Application number: CNU2008202393414U
Authority: CN
Inventors: 董后友; 肖本明
Original assignee: Anhui Kradio Communication & Technology Co Ltd
Current assignee: Anhui Kradio Communication & Technology Co Ltd
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-10-28
Anticipated expiration: 2018-12-30

Abstract

The utility model discloses a TD-SCDMA filter, which is provided with a solid case. The case is internally provided with a hollow chamber the inner surface of which is plated with silver; the hollow chamber is internally provided with a plurality of TD signal resonance frequency control rods and a plurality of near-end and far-end limiting control components; the first TD signal resonance frequency control rod of the hollow chamber is connected with a signal input port by a signal transmission line, and the last TD signal resonance frequency control rod of the hollow chamber is connected with a signal output port by the signal transmission line; and the signal input port and the signal output port are both arranged on the lateral side of the case; the upper part of the case is provided with a cover board which is provided with a plurality of through holes and screw holes. The utility model has the advantages of low consumption, high stability, small external size, beautiful design, smooth signal transmission and convenient installation and maintenance.

Description

The TD-SCDMA filter

Technical field:

The utility model relates to mobile communication equipment, a kind of specifically TD-SCDMA filter.

Background technology:

What have all kinds of antennas and transceiver input port now is not low-loss, selective filter.All still adopt the irradiation structure and the multi-cavity resonance structure of solid type, bulky, complex structure, processing difficulties has become the major obstacle of wireless communications products microminiaturization: its main cause is that the radiation transformed space of its institute's foundation and frequency resonance space are that the electrolyte constant approaches 1, the free air of loss minimum.Opening up the electric constant of separating of various different sizes and also controlled, and separate the lower new material replacement free air of matter loss, is to realize antenna and filter complanation, microminiaturization and intelligentized major technique approach.

If a kind of low-loss high stability TD-SCDMA filter is provided, adopt time division duplex (TDD) technology, only need a 1.6MHz bandwidth, and FDD to be the cdma2000 of representative need 1.25 * 2MHz bandwidth, WCDMA needs 5 * 2MHz to communicate by letter; Its voice spectrum utilance than WCDMA up to 2.5 times, data spectrum utilance even up to 3.1 times; Frequency range is fit to the multi-operator environment in pairs.Adopt a large amount of advanced technologies such as smart antenna, joint-detection and uplink synchronous, can reduce transmitting power, reduce multiple access and disturb, improve power system capacity; Can overcome the shortcoming that soft handover takies resource in a large number; Adopt low-loss high stability TD-SCDMA filter not want duplexer, can simplify radio circuit, system equipment and mobile phone cost are lower.Adopt the software radio advanced technology, easier realization multi-standard base station and multimode terminal, system is easier to upgrading, is more suitable at first building at the big city of GSM hot zones, adopts the professional and realization Digital Clustering of new generation of the easier support of low-loss high stability TD-SCDMA filter PTT.Can offset interference effectively, system can be worked under the condition of full code channel, therefore, the spectrum efficiency height can satisfy following expansion demand.

Summary of the invention:

The purpose of this utility model provides a kind of low-loss high stability TD-SCDMA filter, is mainly used in mobile communication TD-SCDMA system receiving and transmitting signal filtering device.Can realize simultaneously will extensive use the transmitting-receiving of TD-SCDMA system signal, not only can work as single filtration module and use but also can work as the duplexer use.Low-loss high stability TD-SCDMA filter has two ports and directly is connected to the internal signal receiving equipment by feeder line, and the other end uses feeder line to be connected in the sending and receiving antenna at outdoor base station launching tower top.

The technical solution adopted in the utility model:

TD-SCDMA filter: have a solid box body, cavity is arranged in the box body, the cavity inner surface is silver-plated, a plurality of TD signal resonance frequency control levers and a plurality of near-end and far-end are installed in the cavity suppress control element, first TD signal resonance frequency control lever in the cavity is connected to signal input port by signal transmssion line, last TD signal resonance frequency control lever in the cavity is connected to signal output port by signal transmssion line, and described signal input port and signal output port are installed in the box body side; Cover plate is arranged at box body top.

Described TD signal resonance frequency control lever is the copper post of electroplate, is installed in the box body cavity, pushes up lid from cavity bottom; The copper wire that it is 1.5mm that described near-end and far-end suppress to be installed with a diameter in the middle of the insulator that control element is a polytetrafluoroethylene is welded as the T type with both, is installed in then in the cavity notch that designs; Described signal input port and signal output port adopt SMA-KFD type port connector; Described cavity shape is the special shape according to the different frequency design.

Advantage of the present utility model:

The utility model provides a kind of low-loss high stability TD-SCDMA filter, is mainly used in mobile communication TD-SCDMA system receiving and transmitting signal filtering device.Can realize simultaneously will extensive use the transmitting-receiving of TD-SCDMA system signal, not only can work as single filtration module and use but also can work as the duplexer use.The low patent loss high stability TD-SCDMA filter of this invention has mainly that loss is little, overall dimensions are little, is designed beautifully, the specially defeated plurality of advantages such as unobstructed, convenient for installation and maintenance of signal.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the cover plate schematic diagram.

Embodiment:

Referring to Fig. 1-2;

The utility model provides a kind of low-loss high stability TD-SCDMA filter, comprises box body 1, (abbreviation resonant cavity).Resonant cavity is mainly used to transmit signal and the every needed technical indicator of product that is produced between each frequency, is a kind of microwave transmission line, and electric energy that is produced when powering up work and magnetic energy are stored at inside, chamber.Aerial lug spare is the input of TD signal, output port SMA-KFD type port connector 2,3, be mainly used in the dual-mode antenna device of feeder line (transfer wire between link block and the antenna just) link block outside, and TD signal resonance frequency control lever 3, intra resonant cavity design and silver coating 4, intra resonant cavity (for example: unwanted frequency and index suppresses control elements 5 by near-end and far-end, can suppress its size of control elements change length by near-end and far-end realizes), the input of TD signal, output transmission line 6 (being used for being connected of intra resonant cavity and outside SMA-KFD type connector), a plurality of through holes are arranged on the cover plate 7, screw hole, hole mainly are to be used for cover plate above the cavity and cavity are fixed together.

Claims

1, TD-SCDMA filter, it is characterized in that: have a solid box body, cavity is arranged in the box body, the cavity inner surface is silver-plated, a plurality of TD signal resonance frequency control levers and a plurality of near-end and far-end are installed in the cavity suppress control element, first TD signal resonance frequency control lever in the cavity is connected to signal input port by signal transmssion line, last TD signal resonance frequency control lever in the cavity is connected to signal output port by signal transmssion line, and described signal input port and signal output port are installed in the box body side; Cover plate is arranged at box body top.

2, TD-SCDMA filter according to claim 1 is characterized in that: described TD signal resonance frequency control lever is the copper post of electroplate, is installed in the box body cavity, pushes up lid from cavity bottom; The copper wire that it is 1.5mm that described near-end and far-end suppress to be installed with a diameter in the middle of the insulator that control element is a polytetrafluoroethylene is welded as the T type with both, is installed in then in the cavity notch that designs; Described signal input port and signal output port adopt SMA-KFD type port connector; Described cavity shape is the special shape according to the different frequency design.